One Piece: The God of Destruction

(Dark literature + no system + growth + cold personality + single female protagonist)

The magma that burns everything, the ice at absolute zero, the flash of extreme speed, the monster-like three generals can only lose in the end before the destructive thunder.

The world of pirates is mostly full of darkness, and there is no freedom and justice as imagined.

Chen Fan, who came over at the beginning, had a hellish start and was captured into Impel Down City. After experiencing life and death inside, Chen Fan ran out of the Impel City and ate the Thunder Fruit, which represents the strongest attack power of the natural system. Along the way, he created the strongest pirate group and became the king of the world.

(Brackets, Momonosuke must die!)